DE19961554A1 - Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component - Google Patents
Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into componentInfo
- Publication number
- DE19961554A1 DE19961554A1 DE1999161554 DE19961554A DE19961554A1 DE 19961554 A1 DE19961554 A1 DE 19961554A1 DE 1999161554 DE1999161554 DE 1999161554 DE 19961554 A DE19961554 A DE 19961554A DE 19961554 A1 DE19961554 A1 DE 19961554A1
- Authority
- DE
- Germany
- Prior art keywords
- thread
- mandrel
- screw according
- component
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004873 anchoring Methods 0.000 title claims description 8
- 238000010079 rubber tapping Methods 0.000 title description 2
- 239000004566 building material Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 206010016275 Fear Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0026—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Dowels (AREA)
Abstract
Description
Die Erfindung betrifft eine gewindefurchende Schraube für die Verankerung in einem Bauteil aus Gasbeton, Gasbetonmauerwerk, Leichtbeton oder Leichtbetonmauerwerk oder ähnlichen Baustoffen mit einem Schaft, der wenigstens teilweise mit einem Gewinde versehen ist. The invention relates to a thread-forming screw for anchoring in a component made of gas concrete, gas concrete masonry, lightweight concrete or lightweight concrete masonry or the like Building materials with a shaft that is at least partially threaded.
Die sichere Verankerung von Lasten in Gasbeton, Leichtbeton oder Leichtbetonmauerwerk ist aufgrund der geringen Dichten und Steinfestigkeit solcher und ähnlicher Baustoffe besonders schwierig.The safe anchoring of loads in gas concrete, lightweight concrete or lightweight concrete masonry is due to the low densities and stone strength of such and similar building materials difficult.
Es sind zahlreiche Verankerungssysteme, insbesondere unter Verwendung von Dübeln, ent wickelt worden, die für derartige Verankerungen geeignet sind. Es handelt sich üblicherweise um mehrteilige Systeme, die aufwendig in der Herstellung und zeitraubend in der Montage sind.There are numerous anchoring systems, especially using dowels that have been suitable for such anchoring. It is usually multi-part systems that are complex to manufacture and time-consuming to assemble are.
Der Erfindung liegt die Aufgabe zugrunde, eine gewindefurchende Schraube der eingangs genannten Art zu schaffen, welche direkt und ohne Vorbohren in das Bauteil aus einem der oben angegebenen Werkstoffe in den Verankerungsgrund einschraubbar ist und dadurch eine Verankerung schafft, welche auch hohen Belastungen bei hoher Zuverlässigkeit und Lebens dauer gewachsen ist.The invention has for its object a thread-forming screw of the beginning to create the type mentioned, which directly and without pre-drilling into the component from one of the above materials can be screwed into the anchoring base and thereby a Anchoring creates, which also high loads with high reliability and life has grown continuously.
Aus der DE 298 19 813.4 ist bekannt, daß die auf die tragende Gewindelänge normierte Flä che der Beziehung A0n = k √db genügen sollte, wobei die Konstante k der Ungleichung 1 ≦ k < 2,5 genügen soll. Demgegenüber soll bei der Schraube nach der Erfindung die Kon stante k der Ungleichung 5 ≦ k < 8 genügen.From DE 298 19 813.4 it is known that the area standardized to the supporting thread length che should satisfy the relationship A0n = k √db, where the constant k is the inequality 1 ≦ k <2.5 should suffice. In contrast, the con according to the screw according to the invention constant k satisfy the inequality 5 ≦ k <8.
Der gewindelose Dorn kann verschiedenartige Ausgestaltung haben. So kann er gemäß einer vorteilhaften Ausführung zu seinem Ende hin spitz, abgerundet oder auch abgeflacht auslau fen. Bei einer weiteren Ausgestaltung der Erfindung ist der Dorn konisch mit einem Konus winkel β einer Größe von 10° < als β < 30° ausgebildet. Der Flankenwinkel α des Gewindes, der zwischen zwei entgegengesetzten Flanken eingeschlossen ist, liegt vorzugsweise im Be reich 30° ≦ α < 50°, insbesondere bei etwa 40°.The threadless mandrel can have various designs. According to one advantageous embodiment pointed, rounded or even flattened towards its end fen. In a further embodiment of the invention, the mandrel is conical with a cone angle β of a size of 10 ° <as β <30 °. The flank angle α of the thread, that is enclosed between two opposite flanks is preferably in the loading rich 30 ° ≦ α <50 °, especially at about 40 °.
Der mit Gewinde versehene Schaftteil kann wenigstens über einen Teil seiner Länge konisch mit einem Konuswinkel δ ≦ 10° ausgebildet sein. Schließlich kann bei einer weiteren Ausge staltung der Erfindung der Außendurchmesser des Gewindes wenigstens in einem dem Dorn benachbarten Abschnitt konisch mit einem Konuswinkel von 15° ≦ γ < 30°, insbesondere et wa γ = 27° ausgebildet sein.The threaded shaft portion may be tapered over at least part of its length be designed with a cone angle δ ≦ 10 °. Finally, with another issue staltung the invention of the outer diameter of the thread at least in one of the mandrel adjacent section conical with a cone angle of 15 ° ≦ γ <30 °, in particular et wa γ = 27 °.
Nach dem Ansetzen der Schraube an dem Bauteil wird der gewindelose Dorn, der an den Schaftteil anschließt, mit leichtem axialen Druck in den Baustoff, wie Gasbeton, des Bauteiles eingetrieben. Dabei wird der Gasbeton in der unmittelbaren Umgebung des Dornes radial ver drängt und verdichtet. In diesen verdichtetem Bereich furcht bei weiterem Einschrauben der Schraube deren Gewinde ein entsprechendes Innengewinde in den durch den Dorn voraufge weiteten Hohlraum ein. Ab einer gewissen Einschraubtiefe kann das Gewinde die zum Auf dornen erforderlich Axialkraft selbst aufbringen, ohne daß hierzu ein erhöhter Axialdruck ausgeübt werden müßte, so daß die Schraube leicht und kraftsparend in das Bauteil einge schraubt werden kann.After attaching the screw to the component, the threadless mandrel is attached to the Shaft part connects with slight axial pressure in the building material, such as gas concrete, of the component driven in. The gas concrete is radially ver in the immediate vicinity of the mandrel urges and condenses. Fears in this compressed area if the screw is screwed in further Screw the thread of a corresponding internal thread in the vorgege through the mandrel expanded cavity. From a certain screw-in depth, the thread can be used for opening mandrels required to apply axial force themselves without increasing axial pressure would have to be exercised so that the screw easily and effortlessly inserted into the component can be screwed.
Aufgrund der beim Einschrauben erzeugten Verdichtung des Gasbetons oder ähnlichen Bau stoffes im Bereich der Schraube wird überraschend eine höhere Belastbarkeit und Zuverläs sigkeit der Verankerung erzielt, was einen unerwarteten Vorteil darstellt.Due to the compression of the gas concrete or similar construction generated when screwing in fabric in the area of the screw is surprisingly higher resilience and reliability anchorage achieved, which is an unexpected benefit.
Ein weiterer Vorteil ist, daß dieser Vorteil mit einer dübellosen, direkt in den Verankerungs grund einschraubbaren Schraube, also ohne Einsatz zusätzlicher Bauteile erreicht wird.Another advantage is that this advantage with an anchorless, directly in the anchorage screw that can be screwed in without using additional components.
Die Erfindung ist im folgenden anhand schematischer Zeichnungen an Ausführungsbeispielen mit weiteren Einzelheiten näher erläutert.The invention is based on schematic drawings of exemplary embodiments explained in more detail with further details.
Die Fig. 1 bis 4 zeigen in identischen Seitenansichten eine gewindefurchende Schraube ge mäß der Erfindung, wobei nur in Fig. 1 ein auch bei den verbleibenden Ausführungen vor handener Kopf dargestellt ist. Figs. 1 to 4 show in identical side views of a self-tapping screw accelerator as the invention, wherein only in Fig. 1 a is also shown in the remaining versions before handener head.
Der Einfachheit halber sind für alle Ausführungsbeispiele für gleiche oder ähnliche Elemente gleiche Bezugszahlen verwendet.For the sake of simplicity, the same or similar elements are used for all exemplary embodiments same reference numbers used.
Allen Ausführungsbeispielen ist gemeinsam, daß die gewindefurchende Schraube einen Kopf 1 mit Innensechskant 2 zum Ansetzen eines Schraubendrehers mit entsprechendem Außen sechskant, einen insgesamt mit der Bezugszahl 3 bezeichneten Schaft mit einem an den Kopf 1 anschließenden glatten Schaftteil 4, einen mit Gewinde 5 versehenen Schaftteil 6 und einen absatzlos daran anschließenden gewindelosen Dorn 7 aufweist, der zum Eintreiben der Schraube in den Gas- oder Leichtbeton unter sanftem axialen Druck dient.All of the exemplary embodiments have in common that the thread-forming screw has a head 1 with an internal hexagon 2 for attaching a screwdriver with a corresponding external hexagon, a shaft designated overall by the reference number 3 with a smooth shaft part 4 adjoining the head 1 , and a shaft part 6 provided with thread 5 and has a threadless mandrel 7 adjoining it, which is used to drive the screw into the gas or lightweight concrete under gentle axial pressure.
Das Gewinde 5 ist so gestaltet, daß die auf die tragende Gewindelänge he normierte Fläche
A0n der tragenden Gewindeflanke der Beziehung
The thread 5 is designed in such a way that the area A0n of the supporting thread flank of the relationship, which is standardized to the supporting thread length
A0n = k √db
A0n = k √db
genügt, worin k eine Konstante im Größenbereich 5 ≦ k ≦ 8 ist.is sufficient, where k is a constant in the size range 5 ≦ k ≦ 8.
Der Flankenwinkel des Gewindes beträgt mindestens α = 5°. Bevorzugt liegt er im Bereich zwischen 30° und 50°, insbesondere bei etwa 40°. Der mit dem Gewinde 5 versehene Schaft teil 6 ist vorzugsweise wenigstens über einen Teil seiner Länge konisch mit einem Konus winkel von maximal δ = 10° zum Dornende hin sich verjüngend ausgebildet (nicht darge stellt). Dies hat sich besonders im Hinblick auf die Tatsache als günstig herausgestellt, daß in dem Bauteil kein Loch für das Einbringen der Schraube vorgebohrt zu werden braucht.The flank angle of the thread is at least α = 5 °. It is preferably in the range between 30 ° and 50 °, in particular around 40 °. The shaft part 6 provided with the thread 5 is preferably tapered at least over part of its length with a cone angle of at most δ = 10 ° towards the end of the mandrel (not shown). This has proven to be particularly favorable in view of the fact that no hole needs to be predrilled in the component for the insertion of the screw.
Eine weitere Besonderheit der dargestellten Schraube liegt darin, daß der Außendurchmesser des Gewindes wenigstens in einem dem Dorn 7 benachbarten Abschnitt des Schaftteiles 6 konisch mit einem Konuswinkel 15° ≦ γ ≦ 30°, insbesondere mit etwa γ = 27° ausgebildet ist (vgl. Fig. 1). Dies verringert ebenso wie ein unter dem Winkel δ konisch zulaufender Schaft die für das Einschrauben aufzuwendende Axialkraft.Another feature of the screw shown is that the outer diameter of the thread is formed in at least one of the mandrel 7 adjacent portion of the shank portion 6 conically with a cone angle 15 ° ≦ γ ≦ 30 °, in particular approximately γ = 27 ° (see Fig. . 1). Like a shaft tapering at an angle δ, this reduces the axial force to be screwed in.
Sämtliche bisher beschriebenen Merkmale können bei allen vier Ausführungen gemäß den Fig. 1 bis 4 identisch vorhanden sein. Unterschiedlich ist lediglich die Ausführung des Dornes 7.All of the features described so far can be present identically in all four versions according to FIGS. 1 to 4. The only difference is the design of the mandrel 7 .
Bei der Ausführung nach Fig. 1 ist der Dorn 7 zylindrisch mit einer normal zur Schrauben längsachse verlaufenden Stirnfläche 8 ausgebildet.In the embodiment according to FIG. 1, the mandrel 7 is cylindrical with an end face 8 that runs normal to the screws along the longitudinal axis.
Bei der Ausführung nach Fig. 2 ist der Dorn 7 als Kegelstumpf mit einem Konuswinkel von β ungefähr gleich 15° ausgebildet. Auch hier endet der Dorn bauteilseitig mit einer normal zur Längsachse der Schraube verlaufenden Stirnfläche 8, die in diesem Fall jedoch erheblich klei ner als bei der Ausführung nach Fig. 1 ist.In the embodiment of FIG. 2, the mandrel 7 is formed as a truncated cone with a cone angle of β is approximately equal to 15 °. Again, the mandrel ends on the component side with a normal to the longitudinal axis of the screw end face 8 , which in this case, however, is considerably smaller than in the embodiment according to FIG. 1.
Bei der Ausführung nach Fig. 3 ist der Dorn 7 wie die Spitze eines ballistischen Geschosses mit etwa paraboloidförmig zur Schraubenlängsachse hin verlaufender Spitze 9 am Dornende ausgebildet.In the embodiment according to FIG. 3, the mandrel 7 is designed like the tip of a ballistic projectile with an approximately paraboloid-shaped tip 9 at the end of the mandrel running towards the longitudinal axis of the screw.
Bei der Ausführung nach Fig. 4 ist der Dorn 7 als Vollkonus mit einem Konuswinkel β = 15° ausgebildet.In the embodiment of Fig. 4, the mandrel 7 is a full cone with a cone angle β = 15 ° is formed.
Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausgestaltungen von Bedeutung sein.Those disclosed in the foregoing description, claims and drawings Features can be used individually as well as in any combination for the realization of the invention in its various configurations.
Claims (10)
A0n = k √db
genügt, worin k eine Konstante der Größe 5 ≦ k ≦ 8 ist.1. Thread-rolling screw for anchoring in a component made of gas concrete, lightweight concrete or similar building materials with a shaft ( 3 ) which is at least partially provided with a thread ( 5 ), characterized in that the threaded shaft part ( 5 ) ( 6 ) is a threadless mandrel ( 7 ) upstream for driving into the component and that the area (A0n) of the load-bearing thread flank of the relationship, standardized to the load-bearing thread length (he)
A0n = k √db
is sufficient, where k is a constant of size 5 ≦ k ≦ 8.
10° ≦ β ≦ 30°,
insbesondere mit β etwa 15°, ausgebildet ist.4. Screw according to claim 1 or 2, characterized in that the mandrel ( 7 ) conical with a cone angle β
10 ° ≦ β ≦ 30 °,
in particular with β about 15 °.
30° < α ≦ 50°
liegt.7. Screw according to claim 5 or 6, characterized in that the flank angle in the area
30 ° <α ≦ 50 °
lies.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999161554 DE19961554A1 (en) | 1999-12-20 | 1999-12-20 | Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component |
| DE29924888U DE29924888U1 (en) | 1999-12-20 | 1999-12-20 | Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999161554 DE19961554A1 (en) | 1999-12-20 | 1999-12-20 | Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19961554A1 true DE19961554A1 (en) | 2001-07-05 |
Family
ID=7933478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1999161554 Withdrawn DE19961554A1 (en) | 1999-12-20 | 1999-12-20 | Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19961554A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1678039U (en) * | 1954-04-02 | 1954-06-16 | Gerhard Kraft | CONCRETE-STONE-WOOD SCREW WITH ASSOCIATED SHOT DEVICE |
| GB2124528A (en) * | 1982-07-22 | 1984-02-22 | Illinois Tool Works | A masonry anchor |
| AT389923B (en) * | 1988-01-29 | 1990-02-26 | Sfs Stadler Ag | SELF-DRILLING AND THREADING SCREW FOR TURNING INTO GAS-CONCRETE |
| DE9408261U1 (en) * | 1994-05-19 | 1994-09-08 | Mage Ag, Courtaman | Fiber cement plate screw |
| DE29906105U1 (en) * | 1999-04-03 | 1999-07-29 | Duve Umformtechnik GmbH, 58809 Neuenrade | screw |
| DE29819813U1 (en) * | 1998-11-05 | 2000-03-09 | Hettich & Co | Tapping screw |
-
1999
- 1999-12-20 DE DE1999161554 patent/DE19961554A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1678039U (en) * | 1954-04-02 | 1954-06-16 | Gerhard Kraft | CONCRETE-STONE-WOOD SCREW WITH ASSOCIATED SHOT DEVICE |
| GB2124528A (en) * | 1982-07-22 | 1984-02-22 | Illinois Tool Works | A masonry anchor |
| AT389923B (en) * | 1988-01-29 | 1990-02-26 | Sfs Stadler Ag | SELF-DRILLING AND THREADING SCREW FOR TURNING INTO GAS-CONCRETE |
| DE9408261U1 (en) * | 1994-05-19 | 1994-09-08 | Mage Ag, Courtaman | Fiber cement plate screw |
| DE29819813U1 (en) * | 1998-11-05 | 2000-03-09 | Hettich & Co | Tapping screw |
| DE29906105U1 (en) * | 1999-04-03 | 1999-07-29 | Duve Umformtechnik GmbH, 58809 Neuenrade | screw |
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| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8130 | Withdrawal |